Change double texture error to warning

configure.ac

 ## ExampleLib Example: an example of using Automake to link with a library
 
-AC_INIT([freetype-gl], [1.9], [bernd@net2o.de], [freetype-gl for Linux/Android],
+AC_INIT([freetype-gl], [1.10], [bernd@net2o.de], [freetype-gl for Linux/Android],
         [https://github.com/forthy42/freetype-gl])
 AC_PREREQ([2.59])
 AM_INIT_AUTOMAKE([1.10 -Wall no-define])

freetype-gl-err.c

@@ -9,6 +9,7 @@
 #include "freetype-gl-err.h"
 
 __THREAD int freetype_gl_errno=0;
+__THREAD int freetype_gl_warnings=0;
 __THREAD char * freetype_gl_message=NULL;
 
 #ifdef __ANDROID__

freetype-gl-err.h

@@ -29,6 +29,11 @@ namespace ftgl {
  *                      Errors < FTGL_ERR_BASE are pass-through from Freetype
  */
 extern __THREAD int freetype_gl_errno;
+/**
+ * freetype_gl_warnings is a flag that activates output of warnings.
+ *                      Default is warnings off
+ */
+extern __THREAD int freetype_gl_warnings;
 /**
  * freetype_gl_message  is the error message if a freetype-gl function fails
  */
@@ -61,6 +66,12 @@ extern char* freetype_gl_errstrs[];
 	freetype_gl_errhook(freetype_gl_errno, freetype_gl_message, __VA_ARGS__); \
     }
 
+#define freetype_gl_warning(errno, ...) {			     \
+	freetype_gl_errno = FTGL_ERR_CAT( FTGL_ERR_PREFIX, errno);	\
+	freetype_gl_message = freetype_gl_errstrs[FTGL_ERR_CAT( FTGL_ERR_PREFIX, errno)-FTGL_ERR_BASE]; \
+	if(freetype_gl_warnings) freetype_gl_errhook(freetype_gl_errno, freetype_gl_message, __VA_ARGS__); \
+    }
+
 #define freetype_error(error, ...) {	     \
 	freetype_gl_errno = FT_Errors[error].code;			\
 	freetype_gl_message = (char*)FT_Errors[error].message;		\

texture-font.c

@@ -886,10 +886,10 @@ cleanup_stroker:
 
     if ( region.x < 0 )
     {
-        freetype_gl_error( Texture_Atlas_Full,
-			   "Texture atlas is full, asked for %i*%i (%s:%d)\n",
-			   tgt_w, tgt_h,
-			   __FILENAME__, __LINE__ );
+        freetype_gl_warning( Texture_Atlas_Full,
+			     "Texture atlas is full, asked for %i*%i (%s:%d)\n",
+			     tgt_w, tgt_h,
+			     __FILENAME__, __LINE__ );
 	texture_font_close( self, MODE_AUTO_CLOSE, MODE_AUTO_CLOSE );
         return 0;
     }