wined3d: Avoid signed-unsigned integer comparisons

[Andrew Talbot]

Changelog:
    wined3d: Avoid signed-unsigned integer comparisons.

diff --git a/dlls/wined3d/directx.c b/dlls/wined3d/directx.c
index acdcc57..4093f7a 100644
--- a/dlls/wined3d/directx.c
+++ b/dlls/wined3d/directx.c
@@ -2247,7 +2247,7 @@ static enum wined3d_pci_device wined3d_guess_card(const struct wined3d_gl_info *
      * memory behind our backs if really needed. Note that the amount of video
      * memory can be overruled using a registry setting. */
 
-    int i;
+    unsigned int i;
     enum wined3d_pci_device device;
 
     for (i = 0; i < (sizeof(card_vendor_table) / sizeof(*card_vendor_table)); ++i)
@@ -5014,7 +5014,7 @@ static void fillGLAttribFuncs(const struct wined3d_gl_info *gl_info)
 static void wined3d_adapter_init_fb_cfgs(struct wined3d_adapter *adapter, HDC dc)
 {
     const struct wined3d_gl_info *gl_info = &adapter->gl_info;
-    unsigned int i;
+    int i;
 
     if (gl_info->supported[WGL_ARB_PIXEL_FORMAT])
     {
diff --git a/dlls/wined3d/surface.c b/dlls/wined3d/surface.c
index 51a7578..a3589b1 100644
--- a/dlls/wined3d/surface.c
+++ b/dlls/wined3d/surface.c
@@ -3763,7 +3763,7 @@ static HRESULT _Blt_ColorFill(BYTE *buf, unsigned int width, unsigned int height
         unsigned int bpp, UINT pitch, DWORD color)
 {
     BYTE *first;
-    int x, y;
+    unsigned int x, y;
 
     /* Do first row */
 
@@ -4842,7 +4842,6 @@ static void fb_copy_to_texture_direct(struct wined3d_surface *dst_surface, struc
     struct wined3d_device *device = dst_surface->resource.device;
     const struct wined3d_gl_info *gl_info;
     float xrel, yrel;
-    UINT row;
     struct wined3d_context *context;
     BOOL upsidedown = FALSE;
     RECT dst_rect = *dst_rect_in;
@@ -4910,6 +4909,7 @@ static void fb_copy_to_texture_direct(struct wined3d_surface *dst_surface, struc
     }
     else
     {
+        LONG row;
         UINT yoffset = src_surface->resource.height - src_rect->top + dst_rect.top - 1;
         /* I have to process this row by row to swap the image,
          * otherwise it would be upside down, so stretching in y direction
@@ -4923,7 +4923,7 @@ static void fb_copy_to_texture_direct(struct wined3d_surface *dst_surface, struc
                 /* Well, that stuff works, but it's very slow.
                  * find a better way instead
                  */
-                UINT col;
+                LONG col;
 
                 for (col = dst_rect.left; col < dst_rect.right; ++col)
                 {