Don't warn about unused variables - there's a ton of them. :)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%404396

Xcode-iPhoneOS/SDL/SDLiPhoneOS.xcodeproj/project.pbxproj

@@ -1144,7 +1144,7 @@
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_DEBUGGING_SYMBOLS = full;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
+				GCC_WARN_UNUSED_VARIABLE = NO;
 				ONLY_ACTIVE_ARCH = NO;
 				PREBINDING = NO;
 				SDKROOT = iphoneos2.0;
@@ -1159,7 +1159,7 @@
 				"CODE_SIGN_IDENTITY[sdk=iphoneos*]" = "iPhone Developer";
 				GCC_C_LANGUAGE_STANDARD = c99;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
-				GCC_WARN_UNUSED_VARIABLE = YES;
+				GCC_WARN_UNUSED_VARIABLE = NO;
 				PREBINDING = NO;
 				SDKROOT = iphoneos2.0;
 			};