diff --git a/code/nel/tools/3d/lightmap_optimizer/main.cpp b/code/nel/tools/3d/lightmap_optimizer/main.cpp
index 3323cce40..f7e999799 100644
--- a/code/nel/tools/3d/lightmap_optimizer/main.cpp
+++ b/code/nel/tools/3d/lightmap_optimizer/main.cpp
@@ -920,6 +920,14 @@ int main(int nNbArg, char **ppArgs)
 								const CMeshGeom *pMG = dynamic_cast<const CMeshGeom*>(&pMeshML->getMeshGeom(m));
 								pVB = const_cast<CVertexBuffer*>(&pMG->getVertexBuffer());
 							}
+							else
+							{
+								pVB = NULL;
+							}
+
+							// to avoid a possible crash
+							if (!pVB) continue;
+
 							CVertexBufferReadWrite vba; 
 							pVB->lock (vba);
 
diff --git a/code/nel/tools/3d/tga_2_dds/tga2dds.cpp b/code/nel/tools/3d/tga_2_dds/tga2dds.cpp
index 6e235a3f1..f51e1aa04 100644
--- a/code/nel/tools/3d/tga_2_dds/tga2dds.cpp
+++ b/code/nel/tools/3d/tga_2_dds/tga2dds.cpp
@@ -360,24 +360,24 @@ void dividSize (CBitmap &bitmap)
 }
 
 const int bayerDiv8R[4][4] = {
-	7, 3, 6, 2,
-	1, 5, 0, 4,
-	6, 2, 7, 3,
-	0, 4, 1, 5,
+	{ 7, 3, 6, 2 },
+	{ 1, 5, 0, 4 },
+	{ 6, 2, 7, 3 },
+	{ 0, 4, 1, 5 }
 };
 
 const int bayerDiv8G[4][4] = {
-	0, 4, 1, 5,
-	6, 2, 7, 3,
-	1, 5, 0, 4,
-	7, 3, 6, 2,
+	{ 0, 4, 1, 5 },
+	{ 6, 2, 7, 3 },
+	{ 1, 5, 0, 4 },
+	{ 7, 3, 6, 2 }
 };
 
 const int bayerDiv8B[4][4] = {
-	5, 1, 4, 0, 
-	3, 7, 2, 6, 
-	4, 0, 5, 1, 
-	2, 6, 3, 7, 
+	{ 5, 1, 4, 0 }, 
+	{ 3, 7, 2, 6 }, 
+	{ 4, 0, 5, 1 }, 
+	{ 2, 6, 3, 7 }
 };
 
 // ***************************************************************************
diff --git a/code/ryzom/common/src/game_share/crypt.cpp b/code/ryzom/common/src/game_share/crypt.cpp
index 1750d5d20..05f66d87f 100644
--- a/code/ryzom/common/src/game_share/crypt.cpp
+++ b/code/ryzom/common/src/game_share/crypt.cpp
@@ -18,8 +18,8 @@
 
 #include "crypt.h"
 
-char * rz_crypt(register const char *key, register const char *setting, char *buf);
-char *__crypt_sha512(const char *key, const char *setting, char *output);
+std::string rz_crypt(register const char *key, register const char *setting, char *buf);
+std::string __crypt_sha512(const char *key, const char *setting, char *output);
 
 
 // Crypts password using salt
@@ -505,7 +505,7 @@ static char	cryptresult[1+4+4+11+1];	/* encrypted result */
  * Return a pointer to static data consisting of the "setting"
  * followed by an encryption produced by the "key" and "setting".
  */
-char * rz_crypt(register const char *key, register const char *setting, char *buf) {
+std::string rz_crypt(register const char *key, register const char *setting, char *buf) {
 	register char *encp;
 	register long i;
 	register int t;
@@ -580,7 +580,7 @@ char * rz_crypt(register const char *key, register const char *setting, char *bu
 	encp += salt_size;
 	if (rz_des_cipher((char *)&constdatablock, (char *)&rsltblock,
 	    salt, num_iter))
-		return (NULL);
+		return "";
 
 	/*
 	 * Encode the 64 cipher bits as 11 ascii characters.
@@ -602,7 +602,7 @@ char * rz_crypt(register const char *key, register const char *setting, char *bu
 
 	encp[3] = 0;
 
-	return (cryptresult);
+	return cryptresult;
 }
 
 
diff --git a/code/ryzom/common/src/game_share/crypt_sha512.cpp b/code/ryzom/common/src/game_share/crypt_sha512.cpp
index 70a142baa..77e514a3b 100644
--- a/code/ryzom/common/src/game_share/crypt_sha512.cpp
+++ b/code/ryzom/common/src/game_share/crypt_sha512.cpp
@@ -294,7 +294,7 @@ static char *sha512crypt(const char *key, const char *setting, char *output)
 
   /* DS = sha(repeat-salt) */
   sha512_init(&ctx);
-  for (i = 0; i < 16 + md[0]; i++)
+  for (i = 0; i < 16u + md[0]; i++)
     sha512_update(&ctx, salt, slen);
   sha512_sum(&ctx, smd);
 
@@ -373,7 +373,7 @@ static char *sha512crypt(const char *key, const char *setting, char *output)
   return output;
 }
 
-char *__crypt_sha512(const char *key, const char *setting, char *output)
+std::string __crypt_sha512(const char *key, const char *setting, char *output)
 {
   static const char testkey[] = "Xy01@#\x01\x02\x80\x7f\xff\r\n\x81\t !";
   static const char testsetting[] = "$6$rounds=1234$abc0123456789$";