Made the gcc version number checking more robust in llaudio's

CMakeFiles.txt file. Previously it checked for a narrow range of gcc
versions via a regex:

      if (${CXX_VERSION} MATCHES "4.[23]")

Now we explicit check for any version >= 4.2:

      if (${CXX_VERSION_NUMBER} GREATER 419)

indra/cmake/00-Common.cmake

@@ -119,14 +119,14 @@ if (LINUX)
   endif (${GXX_VERSION} STREQUAL ${CXX_VERSION})
 
   # Let's actually get a numerical version of gxx's version
-  STRING(REGEX REPLACE ".* ([0-9])\\.([0-9])\\.([0-9]).*" "\\1\\2\\3" CXX_VERSION ${CXX_VERSION})
+  STRING(REGEX REPLACE ".* ([0-9])\\.([0-9])\\.([0-9]).*" "\\1\\2\\3" CXX_VERSION_NUMBER ${CXX_VERSION})
 
-  # gcc 4.3 and above don't like the LL boost and also 
+  # gcc 4.3 and above don't like the LL boost and also
   # cause warnings due to our use of deprecated headers
-  if(${CXX_VERSION} GREATER 429)
+  if(${CXX_VERSION_NUMBER} GREATER 429)
     add_definitions(-Wno-parentheses)
     set(CMAKE_CXX_FLAGS "-Wno-deprecated ${CMAKE_CXX_FLAGS}")
-  endif (${CXX_VERSION} GREATER 429)
+  endif (${CXX_VERSION_NUMBER} GREATER 429)
 
   # End of hacks.
 

indra/llaudio/CMakeLists.txt

@@ -60,11 +60,11 @@ if (FMOD)
          )
 
     if (LINUX)
-      if (${CXX_VERSION} MATCHES "4.[23]")
+      if (${CXX_VERSION_NUMBER} GREATER 419)
         set_source_files_properties(llaudioengine_fmod.cpp
                                     llstreamingaudio_fmod.cpp
                                     COMPILE_FLAGS -Wno-write-strings)
-      endif (${CXX_VERSION} MATCHES "4.[23]")
+      endif (${CXX_VERSION_NUMBER} GREATER 419)
     endif (LINUX)
 endif (FMOD)