Update Xcode build settings

Author: kharrison

WorldFacts/WorldFacts.xcodeproj/project.pbxproj

@@ -236,7 +236,7 @@
 			isa = PBXProject;
 			attributes = {
 				CLASSPREFIX = UYL;
-				LastUpgradeCheck = 0610;
+				LastUpgradeCheck = 0630;
 				TargetAttributes = {
 					531D960C1AB62FEF00913A78 = {
 						CreatedOnToolsVersion = 6.2;
@@ -414,6 +414,7 @@
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
 				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_OPTIMIZATION_LEVEL = 0;
 				GCC_PREPROCESSOR_DEFINITIONS = (
 					"DEBUG=1",
@@ -455,6 +456,7 @@
 				COPY_PHASE_STRIP = YES;
 				ENABLE_STRICT_OBJC_MSGSEND = YES;
 				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_NO_COMMON_BLOCKS = YES;
 				GCC_VERSION = com.apple.compilers.llvm.clang.1_0;
 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;