Xcode project now builds for 64 bit x86 only, by default (resolves issue #760).

Building for 32 bit x86 in OS X still works if you enable it.

platform/macosx/love-framework.xcodeproj/project.pbxproj

@@ -2255,7 +2255,7 @@
 		10D5479E63C26BB35EB5482E /* Release */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
 				CLANG_ENABLE_MODULES = YES;
 				DEAD_CODE_STRIPPING = YES;
@@ -2291,7 +2291,7 @@
 		64274E785071353E1A1D0D4B /* Debug */ = {
 			isa = XCBuildConfiguration;
 			buildSettings = {
-				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
 				CLANG_ENABLE_MODULES = YES;
 				COPY_PHASE_STRIP = NO;

platform/macosx/love.xcodeproj/project.pbxproj

@@ -301,7 +301,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
 				CLANG_ENABLE_MODULES = YES;
 				FRAMEWORK_SEARCH_PATHS = /Library/Frameworks;
@@ -353,7 +353,7 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				ALWAYS_SEARCH_USER_PATHS = NO;
-				ARCHS = "$(ARCHS_STANDARD_32_64_BIT)";
+				ARCHS = "$(ARCHS_STANDARD_64_BIT)";
 				CLANG_CXX_LANGUAGE_STANDARD = "c++0x";
 				CLANG_ENABLE_MODULES = YES;
 				DEPLOYMENT_POSTPROCESSING = NO;