Use asprintf and check for the return value. (better than malloc+sprintf)

src/libvlc.c

@@ -883,10 +883,8 @@ int libvlc_InternalInit( libvlc_int_t *p_libvlc, int i_argc,
             *psz_parser = '\0';
             psz_parser++;
         }
-        psz_temp = (char *)malloc( strlen(psz_module) + sizeof(",none") );
-        if( psz_temp )
+        if( asprintf( &psz_temp, "%s,none", psz_module ) != -1)
         {
-            sprintf( psz_temp, "%s,none", psz_module );
             libvlc_InternalAddIntf( p_libvlc, psz_temp );
             free( psz_temp );
         }

src/misc/variables.c

@@ -1577,9 +1577,9 @@ int __var_Command( vlc_object_t *p_this, const char *psz_name,
 
     if( psz_msg )
     {
-        *psz_msg = (char*)malloc( 80 );
-        sprintf( *psz_msg, "%s on object %s returned %i (%s)",
-                 psz_cmd, psz_name, i_ret, vlc_error( i_ret ) );
+        if( asprintf( psz_msg, "%s on object %s returned %i (%s)",
+                  psz_cmd, psz_name, i_ret, vlc_error( i_ret ) ) == -1)
+            *psz_msg = NULL;
     }
 
     return i_ret;