Correct spelling mistakes.

code/renderergl2/tr_image.c

@@ -2286,7 +2286,7 @@ static int numImageLoaders = ARRAY_LEN( imageLoaders );
 =================
 R_LoadImage
 
-Loads any of the supported image types into a cannonical
+Loads any of the supported image types into a canonical
 32 bit format.
 =================
 */
@@ -2951,7 +2951,7 @@ SKINS
 CommaParse
 
 This is unfortunate, but the skin files aren't
-compatable with our normal parsing rules.
+compatible with our normal parsing rules.
 ==================
 */
 static char *CommaParse( char **data_p ) {