--- library/generic-canvas/source/myx_gc_figure.cpp
+++ library/generic-canvas/source/myx_gc_figure.cpp
@@ -3164,7 +3164,8 @@
         // Convert depth map so that unused values become 0 (transparent).
         unsigned char* run = buffer;
         for (int i = 0; i < bufferSize; ++i)
-          *run = 255 - *run++;
+          *run = 255 - *(run + 1);
+          run++;
       };
       
       // Release frame buffer binding to enable normal rendering again.
--- library/grt-modules/source/myx_grt_mysql_transformation.c
+++ library/grt-modules/source/myx_grt_mysql_transformation.c
@@ -2432,7 +2432,7 @@
   // add changed table options
   for(i= 0; data[i].key != NULL; i++)
   {
-    if(data[i].value != "")
+    if(strcmp(data[i].value,""))
     {
       sql= str_g_append_and_free(sql, g_strdup_printf(", %s", data[i].value));
       g_free(data[i].value);
@@ -2514,7 +2514,7 @@
   // add changed routine options
   for(i= 0; data[i].key != NULL; i++)
   {
-    if(data[i].value != "")
+    if(strcmp(data[i].value,""))
     {
       sql= str_g_append_and_free(sql, g_strdup_printf(" %s", data[i].value));
       g_free(data[i].value);