no G2C necessary for la.h

This finishes incomplete https://trac.osgeo.org/grass/changeset/54193 and is necessary after r66101.


git-svn-id: https://svn.osgeo.org/grass/grass/trunk@66103 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/gmath.h

@@ -24,7 +24,7 @@
 #define GRASS_GMATH_H
 
 #include <grass/config.h>
-#if defined(HAVE_LIBLAPACK) && defined(HAVE_LIBBLAS) && defined(HAVE_G2C_H)
+#if defined(HAVE_LIBLAPACK) && defined(HAVE_LIBBLAS)
  /* only include if available */
 #include <grass/la.h>
 #endif