fix the glShaderSource prototype, also fix compilation for GLES2

panda/src/glstuff/glGraphicsStateGuardian_src.cxx

@@ -131,7 +131,7 @@ void main(void) {\
 }\n",
 "void main(void) {\
   gl_FragColor = vec4(1.0, 0.0, 0.0, 1.0);\
-}\n");
+}\n", "", "", "");
 #endif
 
 

panda/src/glstuff/glGraphicsStateGuardian_src.h

@@ -150,7 +150,7 @@ typedef void (APIENTRYP PFNGLGETSHADERIVPROC) (GLuint shader, GLenum pname, GLin
 typedef void (APIENTRYP PFNGLGETSHADERINFOLOGPROC) (GLuint shader, GLsizei bufSize, GLsizei *length, GLchar *infoLog);
 typedef GLint (APIENTRYP PFNGLGETUNIFORMLOCATIONPROC) (GLuint program, const GLchar *name);
 typedef void (APIENTRYP PFNGLLINKPROGRAMPROC) (GLuint program);
-typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar* const *string, const GLint *length);
+typedef void (APIENTRYP PFNGLSHADERSOURCEPROC) (GLuint shader, GLsizei count, const GLchar **string, const GLint *length);
 typedef void (APIENTRYP PFNGLUSEPROGRAMPROC) (GLuint program);
 typedef void (APIENTRYP PFNGLUNIFORM4FPROC) (GLint location, GLfloat v0, GLfloat v1, GLfloat v2, GLfloat v3);
 typedef void (APIENTRYP PFNGLUNIFORM4DPROC) (GLint location, GLdouble v0, GLdouble v1, GLdouble v2, GLdouble v3);

panda/src/glstuff/panda_glext.h

@@ -5955,7 +5955,7 @@ GLAPI void APIENTRY glGetVertexAttribPointerv (GLuint index, GLenum pname, GLvoi
 GLAPI GLboolean APIENTRY glIsProgram (GLuint program);
 GLAPI GLboolean APIENTRY glIsShader (GLuint shader);
 GLAPI void APIENTRY glLinkProgram (GLuint program);
-GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar* const *string, const GLint *length);
+GLAPI void APIENTRY glShaderSource (GLuint shader, GLsizei count, const GLchar **string, const GLint *length);
 GLAPI void APIENTRY glUseProgram (GLuint program);
 GLAPI void APIENTRY glUniform1f (GLint location, GLfloat v0);
 GLAPI void APIENTRY glUniform2f (GLint location, GLfloat v0, GLfloat v1);