Enabled warnings on Xcode project

gravity.xcodeproj/project.pbxproj

@@ -476,6 +476,20 @@
 		A9506CF81E69AAEB009A0045 /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_IMPLICIT_SIGN_CONVERSION = NO;
+				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = NO;
+				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
+				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
+				GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES;
+				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
+				GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES;
+				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
+				GCC_WARN_SHADOW = YES;
+				GCC_WARN_SIGN_COMPARE = NO;
+				GCC_WARN_UNUSED_LABEL = YES;
+				GCC_WARN_UNUSED_PARAMETER = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Debug;
@@ -483,6 +497,20 @@
 		A9506CF91E69AAEB009A0045 /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
+				CLANG_WARN_ASSIGN_ENUM = YES;
+				CLANG_WARN_IMPLICIT_SIGN_CONVERSION = NO;
+				CLANG_WARN_SUSPICIOUS_IMPLICIT_CONVERSION = NO;
+				GCC_TREAT_IMPLICIT_FUNCTION_DECLARATIONS_AS_ERRORS = YES;
+				GCC_TREAT_INCOMPATIBLE_POINTER_TYPE_WARNINGS_AS_ERRORS = YES;
+				GCC_WARN_ABOUT_MISSING_FIELD_INITIALIZERS = YES;
+				GCC_WARN_ABOUT_MISSING_NEWLINE = YES;
+				GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES;
+				GCC_WARN_FOUR_CHARACTER_CONSTANTS = YES;
+				GCC_WARN_INITIALIZER_NOT_FULLY_BRACKETED = YES;
+				GCC_WARN_SHADOW = YES;
+				GCC_WARN_SIGN_COMPARE = NO;
+				GCC_WARN_UNUSED_LABEL = YES;
+				GCC_WARN_UNUSED_PARAMETER = YES;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 			};
 			name = Release;