silenced uninitialized variable warnings

src/mesa/main/blend.c

@@ -1,4 +1,4 @@
-/* $Id: blend.c,v 1.4 1999/10/08 09:27:10 keithw Exp $ */
+/* $Id: blend.c,v 1.5 1999/10/21 12:26:21 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -551,6 +551,7 @@ static void blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
                break;
             default:
                /* this should never happen */
+               sA = 0.0F;
                gl_problem(ctx, "Bad blend source A factor in do_blend");
          }
 
@@ -602,6 +603,7 @@ static void blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
                break;
             default:
                /* this should never happen */
+               dR = dG = dB = 0.0F;
                gl_problem(ctx, "Bad blend dest RGB factor in do_blend");
          }
 
@@ -645,6 +647,7 @@ static void blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
                break;
             default:
                /* this should never happen */
+               dA = 0.0F;
                gl_problem(ctx, "Bad blend dest A factor in do_blend");
 	       return;
          }
@@ -688,6 +691,11 @@ static void blend_general( GLcontext *ctx, GLuint n, const GLubyte mask[],
             b = Bd * dB - Bs * sB;
             a = Ad * dA - As * sA;
          }
+         else {
+            /* should never get here */
+            r = g = b = a = 0.0F;  /* silence uninitialized var warning */
+            gl_problem(ctx, "unexpected BlendEquation in blend_general()");
+         }
 
          /* final clamping */
          rgba[i][RCOMP] = (GLint) CLAMP( r, 0.0F, 255.0F );