Correct issue with IMB_ispic returning bool

source/blender/imbuf/IMB_imbuf.h

@@ -355,6 +355,7 @@ short IMB_saveiff(struct ImBuf *ibuf, const char *filepath, int flags);
  * \attention Defined in util.c
  */
 bool IMB_ispic(const char *name);
+int  IMB_ispic_type(const char *name);
 
 /**
  *

source/blender/imbuf/intern/util.c

@@ -183,7 +183,7 @@ const char *imb_ext_audio[] = {
 	NULL
 };
 
-bool IMB_ispic(const char *name)
+int IMB_ispic_type(const char *name)
 {
 	/* increased from 32 to 64 because of the bitmaps header size */
 #define HEADER_SIZE 64
@@ -228,11 +228,15 @@ bool IMB_ispic(const char *name)
 		}
 	}
 
-	return false;
+	return 0;
 
 #undef HEADER_SIZE
 }
 
+bool IMB_ispic(const char *name)
+{
+	return (IMB_ispic_type(name) != 0);
+}
 
 static int isavi(const char *name)
 {