[cairo] [PATCH 7/8] mesh: Avoid theoretical infinite loops

[Bryce W. Harrington]

This quells this warning:

  src/cairo-mesh-pattern-rasterizer.c:731:5: warning: cannot
  optimize possibly infinite loops

I guess the compiler's complaining because if vsteps were negative or
equal to UINT_MAX the loop could cycle infinitely.  Silly compiler.

Signed-off-by: Bryce Harrington <b.harrington at samsung.com>
---
 src/cairo-mesh-pattern-rasterizer.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/cairo-mesh-pattern-rasterizer.c b/src/cairo-mesh-pattern-rasterizer.c
index 6f0dd66..96c7670 100644
--- a/src/cairo-mesh-pattern-rasterizer.c
+++ b/src/cairo-mesh-pattern-rasterizer.c
@@ -693,11 +693,11 @@ draw_bezier_curve (unsigned char *data, int width, int height, int stride,
  * [0,1] (including both extremes).
  */
 static inline void
-rasterize_bezier_patch (unsigned char *data, int width, int height, int stride, int vshift,
+rasterize_bezier_patch (unsigned char *data, int width, int height, int stride, unsigned int vshift,
 			cairo_point_double_t p[4][4], double col[4][4])
 {
     double pv[4][2][4], cstart[4], cend[4], dcstart[4], dcend[4];
-    int vsteps, v, i, k;
+    unsigned int vsteps, v, i, k;
 
     vsteps = 1 << vshift;
 
@@ -728,7 +728,7 @@ rasterize_bezier_patch (unsigned char *data, int width, int height, int stride,
 	dcend[i]   = (col[3][i] - col[1][i]) / vsteps;
     }
 
-    for (v = 0; v <= vsteps; ++v) {
+    for (v = 0; v < vsteps+1; ++v) {
 	cairo_point_double_t nodes[4];
 	for (i = 0; i < 4; ++i) {
 	    nodes[i].x = pv[i][0][0];
-- 
1.7.9.5