patch from Jochen Schmitt to get blender building with gcc4.7

CMakeLists.txt

@@ -1490,10 +1490,9 @@ if(MSVC10)
 endif()
 
 if(CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-	if(WITH_IK_ITASC OR WITH_MOD_FLUID)
+	if(WITH_IK_ITASC)
 		message(WARNING "Using Clang as CXX compiler: disabling WITH_IK_ITASC and WITH_MOD_FLUID, these features will be missing.")
 		set(WITH_IK_ITASC OFF)
-		set(WITH_MOD_FLUID OFF)
 	endif()
 endif()
 

intern/elbeem/intern/ntl_vector3dim.h

@@ -27,6 +27,12 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+/* absolute value */
+template < class T >
+inline T
+ABS( T a )
+{ return (0 < a) ? a : -a ; }
+
 // hack for MSVC6.0 compiler
 #ifdef _MSC_VER
 #if _MSC_VER < 1300

intern/elbeem/intern/utilities.h

@@ -177,12 +177,6 @@ inline T
 MAX( T a, T b )
 { return (a < b) ? b : a ; }
 
-/* absolute value */
-template < class T >
-inline T
-ABS( T a )
-{ return (0 < a) ? a : -a ; }
-
 /* sign of the value */
 template < class T >
 inline T