- fixed USE statements that had trailing whitespaces and broke build process

git-svn-id: https://ppm.inf.ethz.ch/svn/ppmnumerics/branches/ngtopo/libppmnumerics@607 7c7fe9aa-52eb-4d9e-b0a8-ba7d787348e9

src/ppm_mg_core.f

@@ -67,8 +67,8 @@
         !-----------------------------------------------------------------------
         USE ppm_module_data
         USE ppm_module_data_mg
-        USE ppm_module_mg_prolong 
-        USE ppm_module_mg_restrict 
+        USE ppm_module_mg_prolong
+        USE ppm_module_mg_restrict
         USE ppm_module_mg_smooth
         USE ppm_module_mg_res
         USE ppm_module_substart

src/ppm_mg_init.f

@@ -146,7 +146,7 @@
         USE ppm_module_error
         USE ppm_module_mesh_derive
         USE ppm_module_substart
-        USE ppm_module_substop 
+        USE ppm_module_substop
         USE ppm_module_typedef
 
         IMPLICIT NONE

src/ppm_mg_solv.f

@@ -124,8 +124,8 @@
         USE ppm_module_map
         USE ppm_module_mg_core
         USE ppm_module_mg_res
-        USE ppm_module_mg_prolong         
-        USE ppm_module_mg_smooth         
+        USE ppm_module_mg_prolong
+        USE ppm_module_mg_smooth
         USE ppm_module_write
 
         IMPLICIT NONE