Revert "Added -fno-tree-vrp to CMake definition, since tree-vrp optimization

    This reverts commit 442d5051.

cmake/commonconf.cmake

@@ -121,9 +121,6 @@ ELSEIF(UNIX)
     LIST(APPEND CampvisGlobalDefinitions "-DUNIX")
     LIST(APPEND CampvisGlobalDefinitions "-Wall -Wno-unused-local-typedefs -Wno-unused-variable")
     LIST(APPEND CampvisGlobalDefinitions "-D__STDC_CONSTANT_MACROS")  
-    
-    # disable tree-vrp optimization in gcc, which for some strange reason breaks tgt's matrix code...
-    LIST(APPEND CampvisGlobalDefinitions "-fno-tree-vrp")
 ENDIF(WIN32)
 
 # tgt configuration