[gimp] app: fix warnings for win32 builds.

[Jehan Pagès <jehanp src gnome org>]

commit 6edc9380f3afd82a2a2c65273a2ddbe22bee2cd4
Author: Jehan <jehan girinstud io>
Date:   Sun May 29 18:24:06 2016 +0200

    app: fix warnings for win32 builds.
    
    Eliminates some "assignment from incompatible pointer type" warnings,
    on calls to GetProcAddress().

 app/main.c |   15 +++++++++------
 1 files changed, 9 insertions(+), 6 deletions(-)
---
diff --git a/app/main.c b/app/main.c
index ea9af56..016f925 100644
--- a/app/main.c
+++ b/app/main.c
@@ -324,8 +324,9 @@ main (int    argc,
     typedef BOOL (WINAPI *t_SetDllDirectoryA) (LPCSTR lpPathName);
     t_SetDllDirectoryA p_SetDllDirectoryA;
 
-    p_SetDllDirectoryA = GetProcAddress (GetModuleHandle ("kernel32.dll"),
-                                         "SetDllDirectoryA");
+    p_SetDllDirectoryA =
+      (t_SetDllDirectoryA) GetProcAddress (GetModuleHandle ("kernel32.dll"),
+                                           "SetDllDirectoryA");
     if (p_SetDllDirectoryA)
       (*p_SetDllDirectoryA) ("");
   }
@@ -399,8 +400,9 @@ main (int    argc,
     typedef BOOL (WINAPI *t_SetProcessDEPPolicy) (DWORD dwFlags);
     t_SetProcessDEPPolicy p_SetProcessDEPPolicy;
 
-    p_SetProcessDEPPolicy = GetProcAddress (GetModuleHandle ("kernel32.dll"),
-                                            "SetProcessDEPPolicy");
+    p_SetProcessDEPPolicy =
+      (t_SetProcessDEPPolicy) GetProcAddress (GetModuleHandle ("kernel32.dll"),
+                                              "SetProcessDEPPolicy");
     if (p_SetProcessDEPPolicy)
       (*p_SetProcessDEPPolicy) (PROCESS_DEP_ENABLE|PROCESS_DEP_DISABLE_ATL_THUNK_EMULATION);
   }
@@ -411,8 +413,9 @@ main (int    argc,
     typedef HRESULT (WINAPI *t_SetCurrentProcessExplicitAppUserModelID) (PCWSTR lpPathName);
     t_SetCurrentProcessExplicitAppUserModelID p_SetCurrentProcessExplicitAppUserModelID;
 
-    p_SetCurrentProcessExplicitAppUserModelID = GetProcAddress (GetModuleHandle ("shell32.dll"),
-                                                                "SetCurrentProcessExplicitAppUserModelID");
+    p_SetCurrentProcessExplicitAppUserModelID =
+      (t_SetCurrentProcessExplicitAppUserModelID) GetProcAddress (GetModuleHandle ("shell32.dll"),
+                                                                  "SetCurrentProcessExplicitAppUserModelID");
     if (p_SetCurrentProcessExplicitAppUserModelID)
       (*p_SetCurrentProcessExplicitAppUserModelID) (L"gimp.GimpApplication");
   }